Identifying Non-Element Substances
This question requires identifying which of the given options is a compound, not a pure chemical element.
Analyzing the Options
- Silicon: This is a chemical element with the symbol Si.
- Germanium: This is a chemical element with the symbol Ge.
- Graphite: This is an allotrope (a specific form) of the element Carbon (C).
- Silica: This is commonly known as Silicon Dioxide, with the chemical formula $SiO_2$.
Conclusion: Element vs. Compound
Silica ($SiO_2$) consists of atoms of both Silicon and Oxygen bonded together. It is therefore a compound.
Silicon, Germanium, and Carbon (represented by graphite) are all elements.
Answer Derivation: Since Silica is a compound ($SiO_2$) and not a pure element, it is the correct answer.
Similar Questions
- What is the Common name of mercury?
- Settling down of heavier insoluble components of a mixture of water and insoluble substances is called:
- The compound of a metal found in nature is called:
- Heavy Water is so called because:
- Which of the following elements is a versatile element that forms the basis for all living organisms and many of the things we use?
- If a solution changes the colour of blue litmus paper to red, what will the pH of this solution be?
- Which of the following is NOT an allotrope of Carbon?
- The chemical name of blue vitriol is ________.
Which of the following substances is considered neutral according to the pH scale?
Which term refers to the quantitative study of reactants and products in a chemical reaction?
Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
The volume of CO 2liberated at STP when 10 gm of 90% pure limestone strongly heated is
